1
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Chen Y, Liang T, Chen L, Chen Y, Yang BR, Luo Y, Liu GS. Self-assembly, alignment, and patterning of metal nanowires. NANOSCALE HORIZONS 2022; 7:1299-1339. [PMID: 36193823 DOI: 10.1039/d2nh00313a] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Armed with the merits of one-dimensional nanostructures (flexibility, high aspect ratio, and anisotropy) and metals (high conductivity, plasmonic properties, and catalytic activity), metal nanowires (MNWs) have stood out as a new class of nanomaterials in the last two decades. They are envisaged to expedite significantly and even revolutionize a broad spectrum of applications related to display, sensing, energy, plasmonics, photonics, and catalysis. Compared with disordered MNWs, well-organized MNWs would not only enhance the intrinsic physical and chemical properties, but also create new functions and sophisticated architectures of optoelectronic devices. This paper presents a comprehensive review of assembly strategies of MNWs, including self-assembly for specific structures, alignment for anisotropic constructions, and patterning for precise configurations. The technical processes, underlying mechanisms, performance indicators, and representative applications of these strategies are described and discussed to inspire further innovation in assembly techniques and guide the fabrication of optoelectrical devices. Finally, a perspective on the critical challenges and future opportunities of MNW assembly is provided.
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Affiliation(s)
- Ying Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China.
| | - Tianwei Liang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China.
| | - Lei Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China.
- Key Laboratory of Visible Light Communications of Guangzhou, Jinan University, Guangzhou 510632, China
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Guangzhou 510632, China
| | - Yaofei Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China.
- Key Laboratory of Visible Light Communications of Guangzhou, Jinan University, Guangzhou 510632, China
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Guangzhou 510632, China
| | - Bo-Ru Yang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510006, China
| | - Yunhan Luo
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China.
- Key Laboratory of Visible Light Communications of Guangzhou, Jinan University, Guangzhou 510632, China
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Guangzhou 510632, China
| | - Gui-Shi Liu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China.
- Key Laboratory of Visible Light Communications of Guangzhou, Jinan University, Guangzhou 510632, China
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Guangzhou 510632, China
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2
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Lei P, Li Y, Song X, Hao Y, Deng Z. DNA‐Programmable AgAuS‐Primed Conductive Nanowelding Wires‐Up Wet Colloids. Angew Chem Int Ed Engl 2022; 61:e202203568. [DOI: 10.1002/anie.202203568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Indexed: 12/11/2022]
Affiliation(s)
- Pengcheng Lei
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Yanjuan Li
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Xiaojun Song
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Yan Hao
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Zhaoxiang Deng
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
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3
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Lei P, Li Y, Song X, Hao Y, Deng Z. DNA‐Programmable AgAuS‐Primed Conductive Nanowelding Wires up Wet Colloids. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pengcheng Lei
- University of Science and Technology of China Department of Chemistry CHINA
| | - Yanjuan Li
- University of Science and Technology of China Department of Chemistry CHINA
| | - Xiaojun Song
- University of Science and Technology of China Department of Chemistry CHINA
| | - Yan Hao
- University of Science and Technology of China Department of Chemistry CHINA
| | - Zhaoxiang Deng
- University of Science and Technology of China Department of Chemistry 96 Jinzhai Road 230026 Hefei CHINA
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4
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Lee K, Moon J, Jeong J, Hong SW. Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry. MATERIALS 2021; 14:ma14226824. [PMID: 34832226 PMCID: PMC8618760 DOI: 10.3390/ma14226824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 12/12/2022]
Abstract
Inorganic metal halide perovskite nanocrystals, such as quantum dots (QDs), have emerged as intriguing building blocks for miniaturized light-emitting and optoelectronic devices. Although conventional lithographic approaches and printing techniques allow for discrete patterning at the micro/nanoscale, it is still important to utilize intrinsic QDs with the concomitant retaining of physical and chemical stability during the fabrication process. Here, we report a simple strategy for the evaporative self-assembly to produce highly ordered structures of CsPbBr3 and CsPbI3 QDs on a substrate in a precisely controllable manner by using a capillary-bridged restrict geometry. Quantum confined CsPbBr3 and CsPbI3 nanocrystals, synthesized via a modified hot-injection method with excess halide ions condition, were readily adapted to prepare colloidal QD solutions. Subsequently, the spatially patterned arrays of the perovskite QD rings were crafted in a confirmed geometry with high fidelity by spontaneous solvent evaporation. These self-organized concentric rings were systemically characterized regarding the center-to-center distance, width, and height of the patterns. Our results not only facilitate a fundamental understanding of assembly in the perovskite QDs to enable the solution-printing process but also provide a simple route for offering promising practical applications in optoelectronics.
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Affiliation(s)
- Kwan Lee
- Department of Advanced Materials Engineering, Kyungsung University, Busan 48434, Korea
- Correspondence: (K.L.); (S.W.H.)
| | - Jonghyun Moon
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan 46241, Korea; (J.M.); (J.J.)
| | - Jeonghwa Jeong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan 46241, Korea; (J.M.); (J.J.)
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan 46241, Korea; (J.M.); (J.J.)
- Correspondence: (K.L.); (S.W.H.)
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5
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Liu H, Wang Y, Luo Y, Guo M, Feng Y, Liu M. Tunable coffee-ring formation of halloysite nanotubes by evaporating sessile drops. SOFT MATTER 2021; 17:9514-9527. [PMID: 34617549 DOI: 10.1039/d1sm01150b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Halloysite nanotubes (HNTs) are one-dimensional clay nanomaterials with a length of 200-1000 nm and a diameter of ∼50 nm. Understanding the self-assembly behavior of such unique nanoparticles is important to develop their applications in functional devices. In this study, the "coffee-ring" patterns of HNTs are investigated which are formed by evaporation of the sessile droplets of HNT aqueous dispersion on different substrates. The coffee-ring pattern with various dimensions was characterized using a polarizing microscope (POM), a scanning electron microscope (SEM), and a 3D optical profilometer. The diameter, height, and area of the coffee-ring patterns depend on the concentration of HNT dispersion, the droplet volume, and surface wettability. POM and SEM results suggested that the nanotubes were highly ordered in the edge and the middle of the coffee-ring. The coffee-ring effect of HNTs could be suppressed by increasing the evaporation temperature of substrates or adding polymer additives. In addition, multiple-ring patterns consistent with protein rings surrounding HNT rings were formed, which can be utilized to detect the presence of proteins in biological samples. This work illustrated the relationship between the formation of coffee-ring patterns and the experimental conditions, which provided an additional research chance and allowed application development for HNTs using the liquid droplet self-assembly.
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Affiliation(s)
- Hongzhong Liu
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Yao Wang
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Yumin Luo
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Min Guo
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Yue Feng
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Mingxian Liu
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
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6
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Ren J, Crivoi A, Duan F. Dendritic nanoparticle self-assembly from drying a sessile nanofluid droplet. Phys Chem Chem Phys 2021; 23:15774-15783. [PMID: 34286762 DOI: 10.1039/d1cp01181b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The pattern formation left by a drying nanofluid droplet is related to the evaporation induced particle self-assembly. The experimental results demonstrate the formation of dendritic particle deposition after the liquid phase of unpinned sessile nanofluid droplets is fully evaporated. The dried-in particle assemblies exhibit the dendritic patterns connecting the sprawling branches with a central core structure. The branched structures are formed by particles merging in the receding front. A three-dimensional lattice-gas kinetic Monte Carlo model is developed to simulate the particle self-assembling behaviour in a drying particle-laden droplet with the dewetting three-phase line. The parameter study is carried out to demonstrate the trend of the dendritic pattern formation. The various patterns are simulated by varying the chemical potentials and the interaction energies among particles, liquids, and substrates. The dendritic particle depositions are measured in three dimensions after the nanofluid droplet is completely dried. Qualitative agreement is observed between the experimental and the numerical results. Thicker branches and larger central cores are observed with an increase of particle concentrations.
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Affiliation(s)
- Junheng Ren
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
| | - Alexandru Crivoi
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
| | - Fei Duan
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
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7
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Jeon J, Tan ATL, Lee J, Park JE, Won S, Kim S, Bedewy M, Go J, Kim JK, Hart AJ, Wie JJ. High-Speed Production of Crystalline Semiconducting Polymer Line Arrays by Meniscus Oscillation Self-Assembly. ACS NANO 2020; 14:17254-17261. [PMID: 33232120 DOI: 10.1021/acsnano.0c07268] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Evaporative self-assembly of semiconducting polymers is a low-cost route to fabricating micrometer and nanoscale features for use in organic and flexible electronic devices. However, in most cases, rate is limited by the kinetics of solvent evaporation, and it is challenging to achieve uniformity over length- and time-scales that are compelling for manufacturing scale-up. In this study, we report high-throughput, continuous printing of poly(3-hexylthiophene) (P3HT) by a modified doctor blading technique with oscillatory meniscus motion-meniscus-oscillated self-assembly (MOSA), which forms P3HT features ∼100 times faster than previously reported techniques. The meniscus is pinned to a roller, and the oscillatory meniscus motion of the roller generates repetitive cycles of contact-line formation and subsequent slip. The printed P3HT lines demonstrate reproducible and tailorable structures: nanometer scale thickness, micrometer scale width, submillimeter pattern intervals, and millimeter-to-centimeter scale coverage with highly defined boundaries. The line width as well as interval of P3HT patterns can be independently controlled by varying the polymer concentration levels and the rotation rate of the roller. Furthermore, grazing incidence wide-angle X-ray scattering (GIWAXS) reveals that this dynamic meniscus control technique dramatically enhances the crystallinity of P3HT. The MOSA process can potentially be applied to other geometries, and to a wide range of solution-based precursors, and therefore will develop for practical applications in printed electronics.
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Affiliation(s)
- Jisoo Jeon
- Department of Polymer Science and Engineering, Inha University, Incheon 22212, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Alvin T L Tan
- Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jaeyong Lee
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk 37673, Republic of Korea
| | - Jeong Eun Park
- Department of Polymer Science and Engineering, Inha University, Incheon 22212, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Sukyoung Won
- Department of Polymer Science and Engineering, Inha University, Incheon 22212, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Sanha Kim
- Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mostafa Bedewy
- Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Jamison Go
- Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jin Kon Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk 37673, Republic of Korea
| | - A John Hart
- Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jeong Jae Wie
- Department of Polymer Science and Engineering, Inha University, Incheon 22212, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
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8
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Kolegov K, Barash L. Applying droplets and films in evaporative lithography. Adv Colloid Interface Sci 2020; 285:102271. [PMID: 33010576 DOI: 10.1016/j.cis.2020.102271] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 01/03/2023]
Abstract
This review covers experimental results of evaporative lithography and analyzes existing mathematical models of this method. Evaporating droplets and films are used in different fields, such as cooling of heated surfaces of electronic devices, diagnostics in health care, creation of transparent conductive coatings on flexible substrates, and surface patterning. A method called evaporative lithography emerged after the connection between the coffee ring effect taking place in drying colloidal droplets and naturally occurring inhomogeneous vapor flux densities from liquid-vapor interfaces was established. Essential control of the colloidal particle deposit patterns is achieved in this method by producing ambient conditions that induce a nonuniform evaporation profile from the colloidal liquid surface. Evaporative lithography is part of a wider field known as "evaporative-induced self-assembly" (EISA). EISA involves methods based on contact line processes, methods employing particle interaction effects, and evaporative lithography. As a rule, evaporative lithography is a flexible and single-stage process with such advantages as simplicity, low price, and the possibility of application to almost any substrate without pretreatment. Since there is no mechanical impact on the template in evaporative lithography, the template integrity is preserved in the process. The method is also useful for creating materials with localized functions, such as slipperiness and self-healing. For these reasons, evaporative lithography attracts increasing attention and has a number of noticeable achievements at present. We also analyze limitations of the approach and ways of its further development.
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9
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Elder B, Neupane R, Tokita E, Ghosh U, Hales S, Kong YL. Nanomaterial Patterning in 3D Printing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1907142. [PMID: 32129917 DOI: 10.1002/adma.201907142] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/18/2019] [Indexed: 05/17/2023]
Abstract
The synergistic integration of nanomaterials with 3D printing technologies can enable the creation of architecture and devices with an unprecedented level of functional integration. In particular, a multiscale 3D printing approach can seamlessly interweave nanomaterials with diverse classes of materials to impart, program, or modulate a wide range of functional properties in an otherwise passive 3D printed object. However, achieving such multiscale integration is challenging as it requires the ability to pattern, organize, or assemble nanomaterials in a 3D printing process. This review highlights the latest advances in the integration of nanomaterials with 3D printing, achieved by leveraging mechanical, electrical, magnetic, optical, or thermal phenomena. Ultimately, it is envisioned that such approaches can enable the creation of multifunctional constructs and devices that cannot be fabricated with conventional manufacturing approaches.
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Affiliation(s)
- Brian Elder
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Rajan Neupane
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Eric Tokita
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Udayan Ghosh
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Samuel Hales
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Yong Lin Kong
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
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10
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Vittala SK, Han D. DNA-Guided Assemblies toward Nanoelectronic Applications. ACS APPLIED BIO MATERIALS 2020; 3:2702-2722. [PMID: 35025404 DOI: 10.1021/acsabm.9b01178] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandeepa Kulala Vittala
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Da Han
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
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11
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Abstract
We theoretically examine the drying of a stationary liquid droplet on an inclined surface. Both analytical and numerical approaches are considered, while assuming that the evaporation results from the purely diffusive transport of liquid vapor and that the contact line is a pinned circle. For the purposes of the analytical calculations, we suppose that the effect of gravity relative to the surface tension is weak, i.e. the Bond number (Bo) is small. Then, we express the shape of the drop and the vapor concentration field as perturbation expansions in terms of Bo. When the Bond number is zero, the droplet is unperturbed by the effect of gravity and takes the form of a spherical cap, for which the vapor concentration field is already known. Here, the Young-Laplace equation is solved analytically to calculate the first-order correction to the shape of the drop. Knowing the first-order perturbation to the drop geometry and the zeroth-order distribution of vapor concentration, we obtain the leading-order contribution of gravity to the rate of droplet evaporation by utilizing Green's second identity. The analytical results are supplemented by numerical calculations, where the droplet shape is first determined by minimizing the Helmholtz free energy and then the evaporation rate is computed by solving Laplace's equation for the vapor concentration field via a finite-volume method. Perhaps counter-intuitively, we find that even when the droplet deforms noticeably under the influence of gravity, the rate of evaporation remains almost unchanged, as if no gravitational effect is present. Furthermore, comparison between analytical and numerical calculations reveals that considering only the leading-order corrections to the shape of the droplet and vapor concentration distribution provides estimates that are valid well beyond their intended limit of very small Bo.
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12
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Li H, Zhao L, Zhu W, Qu X, Wang C, Liu R, Fan Y, Li Z. Fabrication of Concentric Carbon Nanotube Rings and Their Application on Regulating Cell Growth. ACS OMEGA 2019; 4:16209-16216. [PMID: 31592164 PMCID: PMC6777072 DOI: 10.1021/acsomega.9b02449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 09/09/2019] [Indexed: 05/05/2023]
Abstract
The carbon nanotube (CNT) pattern plays an important role in various electronic devices and biological fields for its superior conductivity and biocompatibility. Herein, we fabricated regularly arranged concentric multiwalled carbon nanotube (MWCNT) rings in a Petri dish by evaporation-driven self-assembly technology. By adjusting the dispersion ratio, heating temperature, and solution volume, various MWCNT rings with different shapes and morphologies were obtained. The variation law of ring radius, formation range, and ring numbers was processed with statistical analysis. With fine adjustment of parameters, the control of desired MWCNT rings can be achieved for further scientific researches. By culturing L929 cells with these rings, oriented cell growth along the rings was achieved, which is of significance for cell regulation, tissue repairing, and related biological applications.
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Affiliation(s)
- Hu Li
- Beijing
Advanced Innovation Centre for Biomedical Engineering, Key Laboratory
for Biomechanics and Mechanobiology of Chinese Education Ministry,
School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
| | - Luming Zhao
- CAS
Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro−Nano
Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- College
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Weibo Zhu
- School
of Printing and Packaging Engineering, Beijing
Institute of Graphic Communication, Beijing 102600, China
| | - Xuecheng Qu
- CAS
Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro−Nano
Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- College
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Chan Wang
- CAS
Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro−Nano
Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- College
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Ruping Liu
- School
of Printing and Packaging Engineering, Beijing
Institute of Graphic Communication, Beijing 102600, China
| | - Yubo Fan
- Beijing
Advanced Innovation Centre for Biomedical Engineering, Key Laboratory
for Biomechanics and Mechanobiology of Chinese Education Ministry,
School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
- National
Research Center for Rehabilitation Technical Aids, Beijing 100176, China
- E-mail: (Y.F.)
| | - Zhou Li
- CAS
Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro−Nano
Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- College
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
- E-mail: (Z.L.)
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13
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Kim DO, Pack M, Rokoni A, Kaneelil P, Sun Y. The effect of particle wettability on the stick-slip motion of the contact line. SOFT MATTER 2018; 14:9599-9608. [PMID: 30457136 DOI: 10.1039/c8sm02129e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Contact line dynamics is crucial in determining the deposition patterns of evaporating colloidal droplets. Using high-speed interferometry, we directly observe the stick-slip motion of the contact line in situ and are able to resolve the instantaneous shape of the inkjet-printed, evaporating pico-liter drops containing nanoparticles of varying wettability. Integrated with post-mortem optical profilometry of the deposition patterns, the instantaneous particle volume fraction and hence the particle deposition rate can be determined. The results show that the stick-slip motion of the contact line is a strong function of the particle wettability. While the stick-slip motion is observed for nanoparticles that are less hydrophilic (i.e., particle contact angle θ ≈ 74° at the water-air interface), which results in a multiring deposition, a continuous receding of the contact line is observed for more hydrophilic nanoparticles (i.e., θ ≈ 34°), which leaves a single-ring pattern. A model is developed to predict the number of particles required to pin the contact line based on the force balance of the hydrodynamic drag, interparticle interactions, and surface tension acting on the particles near the contact line with varying particle wettability. A three-fold increase in the number of particles required for pinning is predicted when the particle wettability increases from the wetting angle of θ ≈ 74° to θ ≈ 34°. This finding explains why particles with greater wettability form a single-ring pattern and those with lower wettability form a multi-ring pattern. In addition, the particle deposition rate is found to depend on the particle wettability and vary with time.
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Affiliation(s)
- Dong-Ook Kim
- Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USA.
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14
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Sen D, Das A, Bahadur J, Choudhury N. Dynamic modulation of inter-particle correlation during colloidal assembly in a confined medium: revealed by real time SAXS. Phys Chem Chem Phys 2018; 20:13271-13278. [PMID: 29457174 DOI: 10.1039/c8cp00401c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using real time small-angle X-ray scattering, we ellucidate a hitherto unobserved non-monotonic evolution of inter-particle correlation while colloidal particles assemble across pore boundary in a confined medium under influence of solvent evaporation. Time variation of local volume fraction of the particles passes through distinct modulation prior to reaching equilibrium. It has been demonstrated that the amplitude of oscillation depends strongly on size of the assembling particles. We comprehend such non-linear temporal evolution of particle correlation through density functional theory and molecular dynamics simulation.
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Affiliation(s)
- Debasis Sen
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India. and Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
| | - Avik Das
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India. and Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
| | - Jitendra Bahadur
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India.
| | - Niharendu Choudhury
- Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai-400085, India and Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
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15
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Zhang S, Pelligra CI, Feng X, Osuji CO. Directed Assembly of Hybrid Nanomaterials and Nanocomposites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1705794. [PMID: 29520839 DOI: 10.1002/adma.201705794] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 11/22/2017] [Indexed: 05/19/2023]
Abstract
Hybrid nanomaterials are molecular or colloidal-level combinations of organic and inorganic materials, or otherwise strongly dissimilar materials. They are often, though not exclusively, anisotropic in shape. A canonical example is an inorganic nanorod or nanosheet sheathed in, or decorated by, a polymeric or other organic material, where both the inorganic and organic components are important for the properties of the system. Hybrid nanomaterials and nanocomposites have generated strong interest for a broad range of applications due to their functional properties. Generating macroscopic assemblies of hybrid nanomaterials and nanomaterials in nanocomposites with controlled orientation and placement by directed assembly is important for realizing such applications. Here, a survey of critical issues and themes in directed assembly of hybrid nanomaterials and nanocomposites is provided, highlighting recent efforts in this field with particular emphasis on scalable methods.
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Affiliation(s)
- Shanju Zhang
- Department of Chemistry and Biochemistry, California Polytechnic State University, San Luis Obispo, CA, 93407, USA
| | - Candice I Pelligra
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06511, USA
| | - Xunda Feng
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06511, USA
| | - Chinedum O Osuji
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06511, USA
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16
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Li X, Li B, He M, Wang W, Wang T, Wang A, Yu J, Wang Z, Hong SW, Byun M, Lin S, Yu H, Lin Z. Convenient and Robust Route to Photoswitchable Hierarchical Liquid Crystal Polymer Stripes via Flow-Enabled Self-Assembly. ACS APPLIED MATERIALS & INTERFACES 2018; 10:4961-4970. [PMID: 29308640 DOI: 10.1021/acsami.7b16001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Hierarchically arranged stripes of photoswitchable liquid crystal polymers (LCPs) containing azobenzene moieties were conveniently crafted via a flow-enabled self-assembly (FESA). Interestingly, by subjecting a drop of LCP solution to dry in a restricted geometry comprising two nearly parallel plates with a stationary upper plate and a movable lower plate that programmably traveled in a "stop-and-move" manner during the FESA process, photoswitchable LCP stripes were yielded, displaying two modes of deposition, namely, periodic primary stripes of large dimensions and regularly spaced secondary stripes of small dimensions situated between adjacent primary stripes (i.e., forming hierarchical LCP stripes). Notably, these hierarchical azobenzene moieties-containing stripes demonstrated sequential photoinduced reversible phase transition (i.e., photoswitching) due to the thickness difference between primary and secondary stripes. A UV light-induced expansion effect was observed on the LCP stripes. Clearly, such rapid creation of hierarchical stripes by FESA represents a robust means of organizing polymers, nanoparticles, colloids, DNA, etc. into complex yet ordered patterns over a large area in a simple and controllable manner for potential use in surface relief grating, photoactuators, photoswitchable devices, antifake labels, etc.
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Affiliation(s)
- Xiao Li
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University , Beijing 100871, P. R. China
| | - Bo Li
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Ming He
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Wei Wang
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
- School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P. R. China
| | - Tianjie Wang
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University , Beijing 100871, P. R. China
| | - Aurelia Wang
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Jiwoo Yu
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Zhonglin Wang
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University , Busan 46241, Republic of Korea
| | - Myunghwan Byun
- Department of Advanced Materials Engineering, Keimyung University , Daegu 704-701, Republic of Korea
| | - Shaoliang Lin
- School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P. R. China
| | - Haifeng Yu
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University , Beijing 100871, P. R. China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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17
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Li X, Iocozzia J, Chen Y, Zhao S, Cui X, Wang W, Yu H, Lin S, Lin Z. From Precision Synthesis of Block Copolymers to Properties and Applications of Nanoparticles. Angew Chem Int Ed Engl 2018; 57:2046-2070. [DOI: 10.1002/anie.201705019] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/03/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Xiao Li
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of the, Ministry of Education Peking University Beijing 100871 P.R. China
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - James Iocozzia
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Yihuang Chen
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Shiqiang Zhao
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Xun Cui
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wei Wang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P.R. China
| | - Haifeng Yu
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of the, Ministry of Education Peking University Beijing 100871 P.R. China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P.R. China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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18
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Li X, Iocozzia J, Chen Y, Zhao S, Cui X, Wang W, Yu H, Lin S, Lin Z. Von der Präzisionssynthese von Blockcopolymeren zu Eigenschaften und Anwendungen von funktionellen Nanopartikeln. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201705019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiao Li
- Department of Material Science and Engineering und Key Laboratory of Polymer Chemistry and Physics of the, Ministry of Education Peking University Beijing 100871 Volksrepublik China
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - James Iocozzia
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Yihuang Chen
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Shiqiang Zhao
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Xun Cui
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wei Wang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 Volksrepublik China
| | - Haifeng Yu
- Department of Material Science and Engineering und Key Laboratory of Polymer Chemistry and Physics of the, Ministry of Education Peking University Beijing 100871 Volksrepublik China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 Volksrepublik China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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19
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Spontaneous formation of aligned DNA nanowires by capillarity-induced skin folding. Proc Natl Acad Sci U S A 2017; 114:6233-6237. [PMID: 28559335 DOI: 10.1073/pnas.1700003114] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Although DNA nanowires have proven useful as a template for fabricating functional nanomaterials and a platform for genetic analysis, their widespread use is still hindered because of limited control over the size, geometry, and alignment of the nanowires. Here, we document the capillarity-induced folding of an initially wrinkled surface and present an approach to the spontaneous formation of aligned DNA nanowires using a template whose surface morphology dynamically changes in response to liquid. In particular, we exploit the familiar wrinkling phenomenon that results from compression of a thin skin on a soft substrate. Once a droplet of liquid solution containing DNA molecules is placed on the wrinkled surface, the liquid from the droplet enters certain wrinkled channels. The capillary forces deform wrinkles containing liquid into sharp folds, whereas the neighboring empty wrinkles are stretched out. In this way, we obtain a periodic array of folded channels that contain liquid solution with DNA molecules. Such an approach serves as a template for the fabrication of arrays of straight or wrinkled DNA nanowires, where their characteristic scales are robustly tunable with the physical properties of liquid and the mechanical and geometrical properties of the elastic system.
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20
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Li B, Jiang B, Han W, He M, Li X, Wang W, Hong SW, Byun M, Lin S, Lin Z. Harnessing Colloidal Crack Formation by Flow‐Enabled Self‐Assembly. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700457] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bo Li
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Beibei Jiang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wei Han
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Ming He
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Xiao Li
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wei Wang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering Department of Optics and Mechatronics Engineering Pusan National University Busan 46241 Republic of Korea
| | - Myunghwan Byun
- Department of Advanced Materials Engineering Keimyung University Daegu 704-701 Republic of Korea
| | - Shaoliang Lin
- School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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21
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Li B, Jiang B, Han W, He M, Li X, Wang W, Hong SW, Byun M, Lin S, Lin Z. Harnessing Colloidal Crack Formation by Flow-Enabled Self-Assembly. Angew Chem Int Ed Engl 2017; 56:4554-4559. [PMID: 28252248 DOI: 10.1002/anie.201700457] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Indexed: 11/09/2022]
Abstract
Self-assembly of nanomaterials to yield a wide diversity of high-order structures, materials, and devices promises new opportunities for various technological applications. Herein, we report that crack formation can be effectively harnessed by elaborately restricting the drying of colloidal suspension using a flow-enabled self-assembly (FESA) strategy to yield large-area periodic cracks (i.e., microchannels) with tunable spacing. These uniform microchannels can be utilized as a template to guide the assembly of Au nanoparticles, forming intriguing nanoparticle threads. This strategy is simple and convenient. As such, it opens the possibility for large-scale manufacturing of crack-based or crack-derived assemblies and materials for use in optics, electronics, optoelectronics, photonics, magnetic device, nanotechnology, and biotechnology.
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Affiliation(s)
- Bo Li
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Beibei Jiang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Wei Han
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Ming He
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Xiao Li
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Wei Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Myunghwan Byun
- Department of Advanced Materials Engineering, Keimyung University, Daegu, 704-701, Republic of Korea
| | - Shaoliang Lin
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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22
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Abstract
The unusual formation of particle stripes is observed in evaporating polymer drops containing mixtures of microspheres and nanoparticles. Concentric rings are obtained when capillary shear and Marangoni flows are balanced at low evaporation rates.
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Affiliation(s)
- Chongfeng Zhang
- Department of Chemical Engineering & Materials Science
- Stevens Institute of Technology
- Hoboken
- USA
| | - Pinar Akcora
- Department of Chemical Engineering & Materials Science
- Stevens Institute of Technology
- Hoboken
- USA
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23
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Basu S, Bansal L, Miglani A. Towards universal buckling dynamics in nanocolloidal sessile droplets: the effect of hydrophilic to superhydrophobic substrates and evaporation modes. SOFT MATTER 2016; 12:4896-4902. [PMID: 27125247 DOI: 10.1039/c6sm00837b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The evaporation of a nanocolloidal sessile droplet exhibits preferential particle assembly, nanoporous shell formation and buckling to form cavities with unique morphological features. Here, we have established many universal trends that explain the buckling dynamics under one umbrella irrespective of hydrophobicity, evaporation mode and particle loading. We provide a regime map explaining the droplet morphology and buckling characteristics for droplet evaporation on various substrates. Specifically, we find that the final droplet volume and the radius of curvature at the buckling onset are universal functions of particle concentration. Furthermore, we establish that post-buckling cavity growth is evaporation driven regardless of the substrate.
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Affiliation(s)
- Saptarshi Basu
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, 560012, India.
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24
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Li H, Luo H, Zhang Z, Li Y, Xiong B, Qiao C, Cao X, Wang T, He Y, Jing G. Direct observation of nanoparticle multiple-ring pattern formation during droplet evaporation with dark-field microscopy. Phys Chem Chem Phys 2016; 18:13018-25. [PMID: 27108655 DOI: 10.1039/c6cp00593d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Controllable protocols towards nanoparticle self-assembly are important for applications of functional nanomaterials. Evaporation is a simple yet effective method to realize a gold nanoparticle ordered self-assembly, but until now, little attention has been paid to viewing the corresponding assembly process. Herein, with the help of dark-field microscopy, we in situ monitored the whole dynamic process of gold nanorod (GNR) assembly as the solvent evaporated. Differently from the previous coffee-ring effect, rod-shaped hydrophilic GNRs, within certain concentrations, spontaneously assembled into a multiple-ring pattern on a hydrophobic substrate via droplet drying. The self-assembly mechanism is consistent with a diffusion-driven kinetics, and the influencing factors, including the GNR surface modification, the colloid concentration, the surface property of the substrate, and the shape of the nanoparticles, were systematically investigated.
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Affiliation(s)
- Hui Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
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25
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Kang SH, Hwang WS, Lin Z, Kwon SH, Hong SW. A Robust Highly Aligned DNA Nanowire Array-Enabled Lithography for Graphene Nanoribbon Transistors. NANO LETTERS 2015; 15:7913-7920. [PMID: 26569342 DOI: 10.1021/acs.nanolett.5b02946] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Because of its excellent charge carrier mobility at the Dirac point, graphene possesses exceptional properties for high-performance devices. Of particular interest is the potential use of graphene nanoribbons or graphene nanomesh for field-effect transistors. Herein, highly aligned DNA nanowire arrays were crafted by flow-assisted self-assembly of a drop of DNA aqueous solution on a flat polymer substrate. Subsequently, they were exploited as "ink" and transfer-printed on chemical vapor deposited (CVD)-grown graphene substrate. The oriented DNA nanowires served as the lithographic resist for selective removal of graphene, forming highly aligned graphene nanoribbons. Intriguingly, these graphene nanoribbons can be readily produced over a large area (i.e., millimeter scale) with a high degree of feature-size controllability and a low level of defects, rendering the fabrication of flexible two terminal devices and field-effect transistors.
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Affiliation(s)
| | - Wan Sik Hwang
- Department of Materials Engineering, Korea Aerospace University , Goyang 412-791, Republic of Korea
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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26
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Qu J, Hou X, Fan W, Xi G, Diao H, Liu X. Scalable lithography from Natural DNA Patterns via polyacrylamide gel. Sci Rep 2015; 5:17872. [PMID: 26639572 PMCID: PMC4671135 DOI: 10.1038/srep17872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 11/05/2015] [Indexed: 11/16/2022] Open
Abstract
A facile strategy for fabricating scalable stamps has been developed using cross-linked polyacrylamide gel (PAMG) that controllably and precisely shrinks and swells with water content. Aligned patterns of natural DNA molecules were prepared by evaporative self-assembly on a PMMA substrate, and were transferred to unsaturated polyester resin (UPR) to form a negative replica. The negative was used to pattern the linear structures onto the surface of water-swollen PAMG, and the pattern sizes on the PAMG stamp were customized by adjusting the water content of the PAMG. As a result, consistent reproduction of DNA patterns could be achieved with feature sizes that can be controlled over the range of 40%–200% of the original pattern dimensions. This methodology is novel and may pave a new avenue for manufacturing stamp-based functional nanostructures in a simple and cost-effective manner on a large scale.
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Affiliation(s)
- JieHao Qu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, P.R. China
| | - XianLiang Hou
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China
| | - WanChao Fan
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, P.R. China
| | - GuangHui Xi
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, P.R. China
| | - HongYan Diao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China
| | - XiangDon Liu
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, P.R. China
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27
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Zhang A, Bai H, Li L. Breath Figure: A Nature-Inspired Preparation Method for Ordered Porous Films. Chem Rev 2015; 115:9801-68. [PMID: 26284609 DOI: 10.1021/acs.chemrev.5b00069] [Citation(s) in RCA: 233] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aijuan Zhang
- College of Materials, Xiamen University , Xiamen, 361005, People's Republic of China
| | - Hua Bai
- College of Materials, Xiamen University , Xiamen, 361005, People's Republic of China
| | - Lei Li
- College of Materials, Xiamen University , Xiamen, 361005, People's Republic of China
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28
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Wang Y, Huang R, Qi W, Xie Y, Wang M, Su R, He Z. Capillary Force-Driven, Hierarchical Co-Assembly of Dandelion-Like Peptide Microstructures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:2893-2902. [PMID: 25759325 DOI: 10.1002/smll.201403645] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 02/09/2015] [Indexed: 06/04/2023]
Abstract
The wetting and drying of drops on flexible fibers occurs ubiquitously in nature, and the capillary force underlying this phenomenon has motivated our great interest in learning how to direct supramolecular self-assembly. Here, the hierarchical co-assembly of two aromatic peptides, diphenylalanine (FF) and ferrocene-diphenylalanine (Fc-FF), is reported via sequential, combinatorial assembly. The resulting dandelion-like microstructures have highly complex architectures, where FF microtube arrays serve as the scapes and the Fc-FF nanofibers serve as the flower heads. Homogeneous FF microtubes with diameters tailored between 1 and 9 μm and wall thickness ranging from 70 to 950 nm are initially formed by controlling the degree of supersaturation of the FF and the water content. Once the FF microtubes are formed, the growth of the dandelion-like microstructures is then driven by the capillary force, derived from the wetting and drying of the Fc-FF solution on the FF microtubes. This simple and ingenious strategy offers many opportunities to develop new and creative methods for controlling the hierarchical self-assembly of peptides and thus building highly complex nano and microstructures.
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Affiliation(s)
- Yuefei Wang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P.R. China
| | - Renliang Huang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, P.R. China
| | - Wei Qi
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P.R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P.R. China
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin, 300072, P.R. China
| | - Yanyan Xie
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P.R. China
| | - Mengfan Wang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P.R. China
| | - Rongxin Su
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P.R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P.R. China
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin, 300072, P.R. China
| | - Zhimin He
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P.R. China
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29
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Przybyłek M, Cysewski P, Pawelec M, Ziółkowska D, Kobierski M. On the origin of surface imposed anisotropic growth of salicylic and acetylsalicylic acids crystals during droplet evaporation. J Mol Model 2015; 21:49. [PMID: 25690367 PMCID: PMC4333231 DOI: 10.1007/s00894-015-2599-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 01/26/2015] [Indexed: 11/30/2022]
Abstract
In this paper droplet evaporative crystallization of salicylic acid (SA) and acetylsalicylic acid (ASA) crystals on different surfaces, such as glass, polyvinyl alcohol (PVA), and paraffin was studied. The obtained crystals were analyzed using powder X-ray diffraction (PXRD) technique. In order to better understand the effect of the surface on evaporative crystallization, crystals deposited on glass were scraped off. Moreover, evaporative crystallization of a large volume of solution was performed. As we found, paraffin which is non-polar surface promotes formation of crystals morphologically similar to those obtained via bulk evaporative crystallization. On the other hand, when crystallization is carried out on the polar surfaces (glass and PVA), there is a significant orientation effect. This phenomenon is manifested by the reduction of the number of peaks in PXRD spectrum recorded for deposited on the surface crystals. Noteworthy, reduction of PXRD signals is not observed for powder samples obtained after scraping crystals off the glass. In order to explain the mechanism of carboxylic crystals growth on the polar surfaces, quantum-chemical computations were performed. It has been found that crystal faces of the strongest orientation effect can be characterized by the highest surface densities of intermolecular interactions energy (IIE). In case of SA and ASA crystals formed on the polar surfaces the most dominant faces are characterized by the highest adhesive and cohesive properties. This suggests that the selection rules of the orientation effect comes directly from surface IIE densities.
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Affiliation(s)
- Maciej Przybyłek
- Department of Physical Chemistry, Collegium Medicum of Bydgoszcz, Nicolaus Copernicus University in Toruń, Kurpińskiego 5, 85-950, Bydgoszcz, Poland,
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30
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Li B, Zhang C, Jiang B, Han W, Lin Z. Flow-Enabled Self-Assembly of Large-Scale Aligned Nanowires. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412388] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Li B, Zhang C, Jiang B, Han W, Lin Z. Flow-Enabled Self-Assembly of Large-Scale Aligned Nanowires. Angew Chem Int Ed Engl 2015; 54:4250-4. [DOI: 10.1002/anie.201412388] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Indexed: 11/12/2022]
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32
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Miele E, Accardo A, Falqui A, Marini M, Giugni A, Leoncini M, De Angelis F, Krahne R, Di Fabrizio E. Writing and functionalisation of suspended DNA nanowires on superhydrophobic pillar arrays. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:134-140. [PMID: 25131422 DOI: 10.1002/smll.201401649] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 07/10/2014] [Indexed: 06/03/2023]
Abstract
Nanowire arrays and networks with precisely controlled patterns are very interesting for innovative device concepts in mesoscopic physics. In particular, DNA templates have proven to be versatile for the fabrication of complex structures that obtained functionality via combinations with other materials, for example by functionalisation with molecules or nanoparticles, or by coating with metals. Here, the controlled motion of the a three-phase contact line (TCL) of DNA-loaded drops on superhydrophobic substrates is used to fabricate suspended nanowire arrays. In particular, the deposition of DNA wires is imaged in situ, and different patterns are obtained on hexagonal pillar arrays by controlling the TCL velocity and direction. Robust conductive wires and networks are achieved by coating the wires with a thin layer of gold, and as proof of concept conductivity measurements are performed on single suspended wires. The plastic material of the superhydrophobic pillars ensures electrical isolation from the substrate. The more general versatility of these suspended nanowire networks as functional templates is outlined by fabricating hybrid organic-metal-semiconductor nanowires by growing ZnO nanocrystals onto the metal-coated nanowires.
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Affiliation(s)
- Ermanno Miele
- Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163, Genova, Italy
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33
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Sun Y, Xiao G, Lin Y, Su Z, Wang Q. Self-assembly of large-scale P3HT patterns by confined evaporation in the capillary tube. RSC Adv 2015. [DOI: 10.1039/c4ra13893g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Large-scale P3HT stripe patterns based on a controlled evaporation self-assembly method in a capillary tube have been fabricated.
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Affiliation(s)
- Yingjuan Sun
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- PR China
| | - Guihua Xiao
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- PR China
| | - Yuan Lin
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- PR China
| | - Zhaohui Su
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- PR China
| | - Qian Wang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- PR China
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34
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Sun W, Yang F. Fabrication of asymmetric-gradient-concentric ring patterns via evaporation of droplets of PMMA solution at different substrate temperatures. RSC Adv 2015. [DOI: 10.1039/c5ra01659b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Asymmetric-gradient-concentric ring patterns are fabricated via evaporating a PMMA solution droplet with a circular copper ring as template. Various micro-patterns are formed in the trench between the polymer rings.
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Affiliation(s)
- Wei Sun
- Materials Program
- Department of Chemical and Materials Engineering
- University of Kentucky
- Lexington
- USA
| | - Fuqian Yang
- Materials Program
- Department of Chemical and Materials Engineering
- University of Kentucky
- Lexington
- USA
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35
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Sun W, Yang F. Cooling-induced formation of honeycomb patterns on pre-cast PMMA films at low temperatures. RSC Adv 2015. [DOI: 10.1039/c5ra09579d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Surface patterns formed on pre-cast PMMA films. A typical AFM image shows the hexagon network.
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Affiliation(s)
- Wei Sun
- Materials Program
- Department of Chemical and Materials Engineering
- University of Kentucky
- Lexington
- USA
| | - Fuqian Yang
- Materials Program
- Department of Chemical and Materials Engineering
- University of Kentucky
- Lexington
- USA
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36
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Men Y, Wang W, Xiao P, Gu J, Sun A, Huang Y, Zhang J, Chen T. Controlled evaporative self-assembly of Fe3O4 nanoparticles assisted by an external magnetic field. RSC Adv 2015. [DOI: 10.1039/c5ra02160j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
A simple yet robust approach of magnetic field assisted controlled evaporative self-assembly (CESA) is developed to achieve Fe3O4 nanoparticles (NPs) micro- and nano-patterns in two dimensional (2D) direction.
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Affiliation(s)
- Yonghong Men
- Faculty of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo 315211
- China
- Division of Polymer and Composite Materials
| | - Wenqin Wang
- Faculty of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo 315211
- China
| | - Peng Xiao
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Jincui Gu
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Aihua Sun
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Youju Huang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Jiawei Zhang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Tao Chen
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
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Abstract
We present a framework for calculating the surface density profile of a stain deposited by a drop with a receding contact line. Unlike a pinned drop, a receding drop pushes fluid towards its interior, continuously deposits mass across its substrate as it evaporates, and does not produce the usual "coffee ring." For a thin, circular drop with a uniform evaporation rate, we find the surface density of the stain goes as η(r) ∝ ((r/a0)(-1/2)-r/a0), where r is the radius from the drop center and a0 is the initial outer radius. Under these conditions, the deposited stain has a mountain-like morphology. Our framework can easily be extended to investigate new stain morphologies left by drying drops.
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Affiliation(s)
- Julian Freed-Brown
- Department of Physics, The James Franck Institute, University of Chicago, 929 E 57th Street, Chicago, IL 60637, USA.
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Zhao Y, Cavallaro G, Lvov Y. Orientation of charged clay nanotubes in evaporating droplet meniscus. J Colloid Interface Sci 2014; 440:68-77. [PMID: 25460691 DOI: 10.1016/j.jcis.2014.10.050] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 10/14/2014] [Accepted: 10/16/2014] [Indexed: 11/27/2022]
Abstract
During drying, an aqueous suspension of strongly charged halloysite clay nanotubes concentrates at the edge of the droplet ("coffee-ring" effect) which provides alignment of the tubes along the liquid-substrate contact line. First, the surface charge of the nanotubes was enhanced by polyanion adsorption inside of the lumen to compensate for the internal positive charges. This increased the magnitude of the ξ-potential of the tubes from -36 to -81 mV and stabilized the colloids. Then, colloidal halloysite was dropped onto the substrate, dried at 65 °C and after a concentration of ∼0.05 mg mL(-1) was reached, the alignment of nanotubes occurred starting from the droplet edges. The process was described with Onsager's theory, in which longer nanorods, which have higher surface charge, give better ordering after a critical concentration is reached. This study indicates a new application of halloysite clay nanotubes in polymeric composites with anisotropic properties, microchannel orientation, and production of coatings with aligned nanotubes.
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Affiliation(s)
- Yafei Zhao
- Institute for Micromanufacturing, Louisiana Tech University, Ruston, USA
| | | | - Yuri Lvov
- Institute for Micromanufacturing, Louisiana Tech University, Ruston, USA; Kazan Federal University, Tatarstan, Russian Federation.
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Park JH, Lee DY, Kim YH, Kim JK, Lee JH, Park JH, Lee TW, Cho JH. Flexible and transparent metallic grid electrodes prepared by evaporative assembly. ACS APPLIED MATERIALS & INTERFACES 2014; 6:12380-12387. [PMID: 24999517 DOI: 10.1021/am502233y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We propose a novel approach to fabricating flexible transparent metallic grid electrodes via evaporative deposition involving flow-coating. A transparent flexible metal grid electrode was fabricated through four essential steps including: (i) polymer line pattern formation on the thermally evaporated metal layer onto a plastic substrate; (ii) rotation of the stage by 90° and the formation of the second polymer line pattern; (iii) etching of the unprotected metal region; and (iv) removal of the residual polymer from the metal grid pattern. Both the metal grid width and the spacing were systematically controlled by varying the concentration of the polymer solution and the moving distance between intermittent stop times of the polymer blade. The optimized Au grid electrodes exhibited an optical transmittance of 92% at 550 nm and a sheet resistance of 97 Ω/sq. The resulting metallic grid electrodes were successfully applied to various organic electronic devices, such as organic field-effect transistors (OFETs), organic light-emitting diodes (OLEDs), and organic solar cells (OSCs).
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Affiliation(s)
- Jae Hoon Park
- SKKU Advanced Institute of Nanotechnology (SAINT), ‡School of Chemical Engineering, §School of Advanced Materials Science and Engineering, Sungkyunkwan University , Suwon 440-746, Republic of Korea
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40
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Yang X, Li CY, Sun Y. From multi-ring to spider web and radial spoke: competition between the receding contact line and particle deposition in a drying colloidal drop. SOFT MATTER 2014; 10:4458-4463. [PMID: 24819228 DOI: 10.1039/c4sm00497c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Deposition morphologies of inkjet-printed colloidal drops are examined under various drying conditions, particle volume fractions, and particle sizes. Concentric multi-rings, radial spokes, spider web, foam, and island-like depositions are observed as a result of the competition between the receding contact line and particle deposition during drop drying. Experimentally measured multi-ring spacing, δR, shows good agreement with the model predicted linear correlation with the local ring radius R. The results also show that the instability near the contact line leads to the radial spoke and saw-toothed structures. The resulting wavelength of the radial structures, λ, satisfies λ ~ (3)√R and λ ~ 1/(3)√[1-RH], where RH is the relative humidity. A dimensionless parameter ξ, defined as the radial deposition growth rate to contact line velocity ratio, has been identified to determine the conditions under which the entire contact line can be pinned to leave a continuous ring deposit. Increasing the particle size while keeping the volume fraction the same is found to suppress the formation of the multi-ring deposition, due to a smaller number of particles available to pin the receding contact line.
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Affiliation(s)
- Xin Yang
- Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104, USA.
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41
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Evaporation-driven self-organization of photoluminescent organic dye-doped silica-poly(vinylpyrrolidone) hybrid films prepared by low-speed dip-coating. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.03.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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42
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Lee YM, Jung B, Kim YH, Park AR, Han S, Choe WS, Yoo PJ. Nanomesh-structured ultrathin membranes harnessing the unidirectional alignment of viruses on a graphene-oxide film. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:3899-3904. [PMID: 24652694 DOI: 10.1002/adma.201305862] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 02/03/2014] [Indexed: 06/03/2023]
Affiliation(s)
- Yong Man Lee
- School of Chemical Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 440-746, Republic of Korea
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43
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Sun W, Yang F. Formation of self-organized gradient stripes on precast poly(methyl methacrylate) films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6548-6555. [PMID: 24849400 DOI: 10.1021/la5004275] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A "wire-on-film" template has been developed to construct surface gradient patterns on precast poly(methyl methacrylate) films. Solvent evaporation around a Cu wire leads to the formation of self-organized gradient stripes, with the longitudinal direction of the stripes being parallel to the axis of the Cu wire. Both the spatial wavelength and the amplitude of the stripes near the Cu wire decrease with a decrease of the distance to the center of the Cu wire. The amplitude of the stripes varies linearly with the spatial wavelength for the experimental conditions used, which is a function of the diameter of the Cu wires and the film thickness. Using two parallel copper wires, we demonstrate the possibility of controlling the characteristics of the gradient stripes. A featureless zone is formed between the copper wires, the size of which is dependent on the distance between two wires and the diameter of the copper wires. The results of this study provide a simple method to fabricate gradient gratings on polymer films in an economical and efficient way.
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Affiliation(s)
- Wei Sun
- Materials Program, Department of Chemical and Materials Engineering, University of Kentucky , Lexington, Kentucky 40506, United States
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44
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Men Y, Xiao P, Chen J, Fu J, Huang Y, Zhang J, Xie Z, Wang W, Chen T. Controlled evaporative self-assembly of poly(acrylic acid) in a confined geometry for fabricating patterned polymer brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4863-4867. [PMID: 24702600 DOI: 10.1021/la500996a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A simple yet robust approach was exploited to fabricate large-scaled patterned polymer brushes by combining controlled evaporative self-assembly (CESA) in a confined geometry and self-initiated photografting and photopolymerization (SIPGP). Our method was carried out without any sophisticated instruments, free of lithography, overcoming current difficulties in fabricating polymer patterns by using complex instruments.
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Affiliation(s)
- Yonghong Men
- Division of Polymer and Composite Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science , 519 Zhuangshi Road, Ningbo 315201, China
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45
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Liu R, Wong ST, Lau PPZ, Tomczak N. Stretching and imaging of single DNA chains on a hydrophobic polymer surface made of amphiphilic alternating comb-copolymer. ACS APPLIED MATERIALS & INTERFACES 2014; 6:2479-2485. [PMID: 24472014 DOI: 10.1021/am404907c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Functionalization of amine derivatized glass slides with a poly(maleic anhydride)-based comb-copolymer to facilitate stretching, aligning, and imaging of individual dsDNA chains is presented. The polymer-coated surface is hydrophobic due to the presence of the long alkyl side chains along the polymer backbone. The surface is also characterized by low roughness and a globular morphology. Stretched and aligned bacteriophage λ-DNA chains were obtained using a robust method based on stretching by a receding water meniscus at pH 7.8 without the need for small droplet volumes or precoating the surface with additional layers of (bio)molecules. Although the dye to DNA base pairs ratio did not influence substantially the stretching length distributions, a clear peak at stretching lengths close to the contour length of the dsDNA is visible at larger staining ratios.
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Affiliation(s)
- Rongrong Liu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
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